package com.xs.demo.service;

import java.io.*;
import java.lang.reflect.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.*;

import javax.swing.JOptionPane;

import org.apache.poi.hssf.usermodel.*;

import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.formula.functions.T;
import org.apache.poi.ss.usermodel.Cell;

import com.xs.demo.entity.Userinfo;

public class ExportExcel<T> {
	    public void exportExcel(Collection<T> dataset, OutputStream out)  
	    {  
	        exportExcel("测试POI导出EXCEL文档1", null, dataset, out, "yyyy-MM-dd");  
	    }  
	    public void exportExcel(String[] headers, Map dataset,  
	            OutputStream out)  
	    { 
	    	exportExcel("测试POI导出EXCEL文档Map", headers, dataset, out, "yyyy-MM-dd"); 
	    }
	    
	    public void exportExcel(String[] headers, Collection<T> dataset,  
	            OutputStream out)  
	    {  
	        exportExcel("测试POI导出EXCEL文档2", headers, dataset, out, "yyyy-MM-dd");  
	    }  
	  
	    public void exportExcel(String[] headers, Collection<T> dataset,  
	            OutputStream out, String pattern)  
	    {  
	        exportExcel("测试POI导出EXCEL文档3", headers, dataset, out, pattern);  
	    }  
	  
	    /** 
	     * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上 
	     *  
	     * @param title 
	     *            表格标题名 
	     * @param headers 
	     *            表格属性列名数组 
	     * @param dataset 
	     *            需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的 
	     *            javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据) 
	     * @param out 
	     *            与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中 
	     * @param pattern 
	     *            如果有时间数据，设定输出格式。默认为"yyy-MM-dd" 
	     */  
	    @SuppressWarnings("unchecked")  
	    public void exportExcel(String title, String[] headers,  
	            Collection<T> dataset, OutputStream out, String pattern)  
	    {  
			// 声明一个工作薄
			HSSFWorkbook workbook = new HSSFWorkbook();
			// 生成一个表格
			HSSFSheet sheet = workbook.createSheet(title);
			// 设置表格默认列宽度为15个字节
			sheet.setDefaultColumnWidth((short) 15);
			// 生成一个样式
			HSSFCellStyle style = workbook.createCellStyle();
			// 设置这些样式
			style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
			style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			style.setBorderRight(HSSFCellStyle.BORDER_THIN);
			style.setBorderTop(HSSFCellStyle.BORDER_THIN);
			style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			// 生成一个字体
			HSSFFont font = workbook.createFont();
			font.setColor(HSSFColor.VIOLET.index);
			font.setFontHeightInPoints((short) 12);
			font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
			// 把字体应用到当前的样式
			style.setFont(font);
			// 生成并设置另一个样式
			HSSFCellStyle style2 = workbook.createCellStyle();
			style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
			style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
			style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
			style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
			// 生成另一个字体
			HSSFFont font2 = workbook.createFont();
			font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
			// 把字体应用到当前的样式
			style2.setFont(font2);
	
			// 声明一个画图的顶级管理器
			HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
			// 定义注释的大小和位置,详见文档
			HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
					0, 0, 0, (short) 4, 2, (short) 6, 5));
			// 设置注释内容
			comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
			// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
			comment.setAuthor("leno");
	
			// 产生表格标题行
			HSSFRow row = sheet.createRow(0);
			for (short i = 0; i < headers.length; i++) {
				HSSFCell cell = row.createCell(i);
				cell.setCellStyle(style);
				HSSFRichTextString text = new HSSFRichTextString(headers[i]);
				cell.setCellValue(text);
			}
	
			// 遍历集合数据，产生数据行
			Iterator<T> it = dataset.iterator();
			int index = 0;
			while (it.hasNext()) {
				index++;
				row = sheet.createRow(index);
				T t = (T) it.next();
				// map.put("dataset", dataset);
				// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
				// Field[] fields = t.getClass().getDeclaredFields();
				Field[] fields = t.getClass().getDeclaredFields();
				for (short i = 0; i < fields.length; i++) {
					HSSFCell cell = row.createCell(i);
	
					Field field = fields[i];
					String fieldName = field.getName();
					String getMethodName = "get"
							+ fieldName.substring(0, 1).toUpperCase()
							+ fieldName.substring(1);
					try {
						Class tCls = t.getClass();
						Method getMethod = tCls.getMethod(getMethodName,
								new Class[] {});
						Object value = getMethod.invoke(t, new Object[] {});
						if (value == null) {
							System.out.println("kong value");
							continue;
						}
						// 判断值的类型后进行强制类型转换
						String textValue = null;
						if (value instanceof Boolean) {
							boolean bValue = (Boolean) value;
							textValue = "男";
							if (!bValue) {
								textValue = "女";
							}
						} else if (value instanceof Date) {
							Date date = (Date) value;
							SimpleDateFormat sdf = new SimpleDateFormat(pattern);
							textValue = sdf.format(date);
						} else if (value instanceof byte[]) {
							// 有图片时，设置行高为60px;
							row.setHeightInPoints(60);
							// 设置图片所在列宽度为80px,注意这里单位的一个换算
							sheet.setColumnWidth(i, (short) (35.7 * 80));
							// sheet.autoSizeColumn(i);
							byte[] bsValue = (byte[]) value;
							HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
									1023, 255, (short) 6, index, (short) 6, index);
							anchor.setAnchorType(2);
							patriarch.createPicture(anchor, workbook.addPicture(
									bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
						} else {
							// 其它数据类型都当作字符串简单处理
							textValue = value.toString();
						}
						// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
						if (textValue != null) {
							Pattern p = Pattern.compile("^//d+(//.//d+)?$");
							Matcher matcher = p.matcher(textValue);
							if (matcher.matches()) {
								// 是数字当作double处理
								cell.setCellValue(Double.parseDouble(textValue));
							} else {
								HSSFRichTextString richString = new HSSFRichTextString(
										textValue);
								HSSFFont font3 = workbook.createFont();
								font3.setColor(HSSFColor.BLUE.index);
								richString.applyFont(font3);
								cell.setCellValue(richString);
							}
						}
					} catch (SecurityException e) {
						e.printStackTrace();
					} catch (NoSuchMethodException e) {
						e.printStackTrace();
					} catch (IllegalArgumentException e) {
						e.printStackTrace();
					} catch (IllegalAccessException e) {
						e.printStackTrace();
					} catch (InvocationTargetException e) {
						e.printStackTrace();
					} finally {
						// 清理资源
					}
				}
			}
			try {
				workbook.write(out);
			} catch (IOException e) {
				e.printStackTrace();
			}
	    } 
	    
	    public void exportExcel(String title, String[] headers,  
	            Map<String,Object> dataset, OutputStream out, String pattern)  
	    {  
			// 声明一个工作薄
			HSSFWorkbook workbook = new HSSFWorkbook();
			// 生成一个表格
			HSSFSheet sheet = workbook.createSheet(title);
			// 设置表格默认列宽度为15个字节
			sheet.setDefaultColumnWidth((short) 15);
			// 生成一个样式
			HSSFCellStyle style = workbook.createCellStyle();
			// 设置这些样式
			style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
			style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			style.setBorderRight(HSSFCellStyle.BORDER_THIN);
			style.setBorderTop(HSSFCellStyle.BORDER_THIN);
			style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			// 生成一个字体
			HSSFFont font = workbook.createFont();
			font.setColor(HSSFColor.VIOLET.index);
			font.setFontHeightInPoints((short) 12);
			font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
			// 把字体应用到当前的样式
			style.setFont(font);
			// 生成并设置另一个样式
			HSSFCellStyle style2 = workbook.createCellStyle();
			style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
			style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
			style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
			style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
			// 生成另一个字体
			HSSFFont font2 = workbook.createFont();
			font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
			// 把字体应用到当前的样式
			style2.setFont(font2);
	
			// 声明一个画图的顶级管理器
			HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
			// 定义注释的大小和位置,详见文档
			HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
					0, 0, 0, (short) 4, 2, (short) 6, 5));
			// 设置注释内容
			comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
			// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
			comment.setAuthor("leno");
	
			// 产生表格标题行
			HSSFRow row = sheet.createRow(0);
			for (short i = 0; i < headers.length; i++) {
				HSSFCell cell = row.createCell(i);
				cell.setCellStyle(style);
				HSSFRichTextString text = new HSSFRichTextString(headers[i]);
				cell.setCellValue(text);
			}
	
			// 遍历集合数据，产生数据行
			Collection  a = dataset.values();
			Iterator it = a.iterator();
			int index = 0;
			while (it.hasNext()) {
				index++;
				row = sheet.createRow(index);
				T t = (T) it.next();
				// map.put("dataset", dataset);
				// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
				// Field[] fields = t.getClass().getDeclaredFields();
				Field[] fields = t.getClass().getDeclaredFields();
				for (short i = 0; i < fields.length; i++) {
					HSSFCell cell = row.createCell(i);

					Field field = fields[i];
					String fieldName = field.getName();
					String getMethodName = "get"
							+ fieldName.substring(0, 1).toUpperCase()
							+ fieldName.substring(1);
					try {
						Class tCls = t.getClass();
						Method getMethod = tCls.getMethod(getMethodName,
								new Class[] {});
						Object value = getMethod.invoke(t, new Object[] {});
						if(value == null){
							System.out.println("kong value");
							continue;
						}
						// 判断值的类型后进行强制类型转换
						String textValue = null;
						if (value instanceof Boolean) {
							boolean bValue = (Boolean) value;
							textValue = "男";
							if (!bValue) {
								textValue = "女";
							}
						} else if (value instanceof Date) {
							Date date = (Date) value;
							SimpleDateFormat sdf = new SimpleDateFormat(pattern);
							textValue = sdf.format(date);
						} else if (value instanceof byte[]) {
							// 有图片时，设置行高为60px;
							row.setHeightInPoints(60);
							// 设置图片所在列宽度为80px,注意这里单位的一个换算
							sheet.setColumnWidth(i, (short) (35.7 * 80));
							// sheet.autoSizeColumn(i);
							byte[] bsValue = (byte[]) value;
							HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
									1023, 255, (short) 6, index, (short) 6, index);
							anchor.setAnchorType(2);
							patriarch.createPicture(anchor, workbook.addPicture(
									bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
						} else {
							// 其它数据类型都当作字符串简单处理
							textValue = value.toString();
						}
						// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
						if (textValue != null) {
							Pattern p = Pattern.compile("^//d+(//.//d+)?$");
							Matcher matcher = p.matcher(textValue);
							if (matcher.matches()) {
								// 是数字当作double处理
								cell.setCellValue(Double.parseDouble(textValue));
							} else {
								HSSFRichTextString richString = new HSSFRichTextString(
										textValue);
								HSSFFont font3 = workbook.createFont();
								font3.setColor(HSSFColor.BLUE.index);
								richString.applyFont(font3);
								cell.setCellValue(richString);
							}
						}
					} catch (SecurityException e) {
						e.printStackTrace();
					} catch (NoSuchMethodException e) {
						e.printStackTrace();
					} catch (IllegalArgumentException e) {
						e.printStackTrace();
					} catch (IllegalAccessException e) {
						e.printStackTrace();
					} catch (InvocationTargetException e) {
						e.printStackTrace();
					} finally {
						// 清理资源
					}
				}
			}
			try {
				workbook.write(out);
			} catch (IOException e) {
				e.printStackTrace();
			}
	    } 
	    
	    
	    
	    private String ConvertCellStr(Cell cell, String cellStr) {
	    	switch (cell.getCellType()) {
			case Cell.CELL_TYPE_STRING:
				cellStr = cell.getStringCellValue().toString();
				break;
			case Cell.CELL_TYPE_BOOLEAN:
				cellStr = String.valueOf(cell.getBooleanCellValue());
				break;
			}
	    	return null;
		}

		public static void main(String[] args) {
	        // 测试学生  
	        ExportExcel<Userinfo> ex = new ExportExcel<Userinfo>();  
	        String[] headers =  
	        { "学号", "姓名", "年龄", "性别", "出生日期" };  
	        List<Userinfo> dataset = new ArrayList<Userinfo>();  
	        dataset.add(new Userinfo(101, "11", 15, new Date(), "888888", "Asia"));
	        dataset.add(new Userinfo(102, "11", 15, new Date(), "888888", "Asia"));
	        dataset.add(new Userinfo(103, "11", 15, new Date(), "888888", "Asia"));
	        dataset.add(new Userinfo(104, "11", 15, new Date(), "888888", "Asia"));
	        dataset.add(new Userinfo(105, "11", 15, new Date(), "888888", "Asia"));
	        // 测试图书  
	        try  
	        {  
	            OutputStream out = new FileOutputStream("E://a.xls");  
	            ex.exportExcel(headers, dataset, out);  
	            out.close();  
	            JOptionPane.showMessageDialog(null, "导出成功!");  
	            System.out.println("excel导出成功！");  
	        }  
	        catch (FileNotFoundException e)  
	        {  
	            e.printStackTrace();  
	        }  
	        catch (IOException e)  
	        {  
	            e.printStackTrace();  
	        }  
	    	}  
	    
		}
